,
is a Pythagorean triple. To verify his algorithm show 
.Tell wether a triangle formed with the sides having the following lengths is acute, right ,or obtuse.
1.11,11,15
2. 9,9,13
3. 5n, 12n, 13n where n > 0
4. An algorithm for finding Pythagorean
triples was developed by Euclid around 320 B.C. His method can
be stated as follows: If x and y are positive integers with y
< x, then a = 2xy, ,
is a Pythagorean triple. To verify his algorithm show .